There are various different types of vampires but on this site you're grouped according to age.
The oldest vampires are called Aristocrats, these are over 300 years old and apart from the Vampire Queen they are the most powerful in existence, for that reason there is a cap of 5 Aristocrats only in play.
Next is the Pure vampires, they are 150 years old and above, yet still below 300 years, these vampires often live in settlements together as they come from around the same time period.
Finally is the Apprentice vampires, these are under 150 years and technically still learning from their Sire, these tend to either follow their Master or they live in the Country Manors together.